The collected papers of Albert Einstein

v. 1. The early years, 1879-1902

v. 2. The Swiss years, writings, 1900-1909

v. 3. The Swiss years, writings, 1090-1911

v. 4. The Swiss years, writings, 1912-1914

v. 5. The Swiss years, correspondence, 1902-1914

v. 6. The Berlin years, writings, 1914-1917

v. 8. The Berlin years, correspondence, 1914-1918